/* Fonts */
@font-face {
    font-family: 'Pretendard-Regular';
    src: url('../fonts/Pretendard-Regular.woff') format('woff');
}

@font-face {
    font-family: 'Pretendard-Medium';
    src: url('../fonts/Pretendard-Medium.woff') format('woff');
}

@font-face {
    font-family: 'PyeongChangPeace-Bold';
    src: url('../fonts/PyeongChangPeace-Bold.ttf') format('truetype');
}

/* Global */
html {
    scroll-behavior: smooth;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Pretendard", sans-serif;
    --primary: #262626;
    --second: #171717;
}

body {
    color: var(--primary);
    overflow-x: hidden;
    background: #fff no-repeat center center fixed;
    background-size: cover;
    height: 100vh;
}

section {
    padding: 10px 0;
}

a {
    text-decoration: none;
    color: var(--second);
}

.container {
    max-width: 1100px;
    margin: 60px auto;
    padding: 0 20px;
}

.section-title {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 20px;
}

.tab {
    white-space: pre;
}

.fade-in-box {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease-out;
}

.fade-in-box.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Header & Navigation */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(0, 0, 0, 0);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    height: 65px;
    top: 0;
    z-index: 999;
}

header .logo,
.pc-nav {
    display: flex;
    align-items: center;
}

header .logo img {
    height: 40px;
}

.pc-nav {
    gap: 28px;
}

.pc-nav a {
    font-weight: 500;
    font-size: 15px;
    position: relative;
}

.pc-nav a.active::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 2.5px;
    background: var(--second);
    border-radius: 2px;
}

.hamburger {
    width: 28px;
    height: 22px;
    display: none;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
}

.hamburger span {
    display: block;
    height: 3px;
    background: var(--second);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

.dropdown-menu {
    width: 100%;
    text-align: right;
    padding: 0 40px;
    display: flex;
    flex-direction: column;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
    backdrop-filter: blur(10px);
}

.dropdown-menu a {
    font-size: 16px;
    padding: 12px 0;
    font-weight: 500;
}

.dropdown-menu.active {
    max-height: 0;
}

/* Hero Section */
.home-section {
    width: 100%;
    height: 100vh;
    text-align: center;
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0) 75%, rgba(255, 255, 255, 0) 100%), url(../img/hero-bg.png);
    background-size: cover;
    background-position: center calc(50% - 5vh);
}

@media (max-aspect-ratio: 3/2) {
    .home-section {
        background-size: auto 100vh; 
        animation: movement 15s ease infinite;
    }
}

@keyframes movement {
    0% {
        background-position: 0% calc(50% - 5vh);
    }

    50% {
        background-position: 100% calc(50% - 5vh);
    }

    100% {
        background-position: 0% calc(50% - 5vh);
    }
}

.home-title {
    padding-top: 80vh;
    font-size: 42px;
    font-weight: 1000;
    height: 60px;
    color: var(--primary);
}

.typing-cursor {
    font-size: 42px;
    animation: blink 0.7s infinite;
}

@keyframes blink {
    to {
        opacity: 0;
    }
}

/* Projects & Links (Common Card Style) */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.project-card {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
    transition: 0.15s ease;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.4);
}

.project-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0 0 10px;
    color: #000;
}

.ico-circle {
    margin-top: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 3px solid #000;
    color: #000;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3em;
    transition: all 0.2s ease-in-out;
    cursor: pointer;
}

.ico-circle:hover {
    background-color: #000;
    color: #fff;
}

.stack {
    margin-top: 12px;
    font-size: 14px;
    background: #bbb;
    padding: 6px 10px;
    display: inline-block;
    border-radius: 6px;
    color: #fff;
}

.external-service {
    grid-column: 1 / -1;
}

.external-service summary {
    background-color: rgba(245, 247, 250, 0);
    color: #666;
    text-align: center;
    padding: 8px;
    cursor: pointer;
    list-style: none;
    font-size: 0.9em;
    border-top: 1px solid #666;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.external-service summary:hover {
    background-color: #eee;
    color: var(--second);
}

.external-service[open] summary .hint {
    opacity: 0;
}

.external-service .project-card.wide {
    grid-column: 1 / -1;
    margin-top: 12px;
}

/* Complaint Section */
.petition-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    padding: 20px 40px;
    border-radius: 20px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.info-content p {
    font-size: 1.2rem;
    margin: 10px 0;
    color: #444;
}

.large-btn {
    display: inline-block;
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: bold;
    color: #333;
    border: 2px solid #333;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.large-btn:hover {
    background-color: var(--second);
    color: #fff;
    border-color: var(--second);
    transform: translateY(-3px);
    box-shadow: 0 6px 18px #999;
}

/* Notice Section */
#notice-list-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.notice-item {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    transition: all 0.3s ease;
}

.notice-header {
    padding: 20px 25px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
}

.notice-title-group {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
}

.notice-badge {
    font-size: 11px;
    font-weight: bold;
    padding: 4px 10px;
    border-radius: 20px;
    background: #eee;
    color: #666;
}

.notice-badge.important {
    background: #ffebee;
    color: #ef5350;
}

.notice-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--primary);
}

.notice-date {
    font-size: 14px;
    color: #999;
    margin-left: 15px;
}

.notice-hint {
    font-size: 0.8rem;
    color: #999;
    margin-left: 8px;
}

.notice-content {
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease-in-out;
    background: #fafafa;
}

.notice-item.active .notice-content {
    max-height: 500px;
    padding: 25px;
    border-top: 1px solid #eee;
}

.notice-text {
    line-height: 1.7;
    color: #444;
    white-space: pre-wrap;
}

.notice-file-area {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px dashed #ddd;
}

.file-download-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: 1.5px solid var(--second);
    border-radius: 8px;
    color: var(--second);
    font-weight: bold;
    font-size: 14px;
    transition: 0.2s;
}

.file-download-link:hover {
    background: var(--second);
    color: #fff;
}

/* Gallery Section */
.card-container {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 20px;
    padding: 20px;
    scroll-padding-left: 14px;
    scrollbar-width: none;
}

.card-container::-webkit-scrollbar {
    display: none;
}

.card {
    flex: 0 0 calc(25%);
    scroll-snap-align: start;
    min-width: 250px;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease;
    cursor: pointer;
}

.card:hover {
    transform: translateY(-5px);
}

.card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.card-content {
    padding: 15px;
}

.card-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 8px;
    color: #000;
}

.card-text {
    font-size: 14px;
    color: #333;
    line-height: 1.5;
}

.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    justify-content: center;
    align-items: center;
}

.modal img {
    max-width: 80%;
    max-height: 80%;
    border-radius: 10px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.close-text {
    position: absolute;
    bottom: 40px;
    color: #000;
    font-size: 14px;
    opacity: 0.8;
}

/* Members Section (Infobox) */
.infobox-container {
    width: 100%;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.infobox-image {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
}

.infobox-image img {
    width: 150px;
    height: auto;
}

.main-header {
    text-align: center;
    padding: 15px;
    color: #2c5d72;
}

.title-name {
    font-size: 1.3em;
    font-weight: bold;
}

.infobox-table {
    width: 100%;
    border-collapse: collapse;
    color: #445566;
}

.infobox-table th,
.infobox-table td {
    border-top: 1px solid rgba(165, 205, 221);
    padding: 10px;
    font-size: 0.9em;
}

.label {
    background-color: rgba(230, 242, 250);
    text-align: center;
    font-weight: bold;
    color: #5a8da3;
}

.data {
    background-color: #fff;
}

/* Greeting Section */
.doc {
    width: 100%;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.outro-card {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.outro-card img {
    width: 10vw;
    border-radius: 10px;
}

.outro-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 8px;
    color: var(--primary);
}

.doc-text {
    font-size: 14px;
    color: #333;
    line-height: 1.5;
}

/* Contact & Footer */
#contact {
    line-height: 2;
}

footer {
    margin-top: 60px;
    padding: 40px 0;
    text-align: center;
    color: #666;
    font-size: 14px;
    min-height: 250px;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .card {
        flex: 0 0 calc(50%);
    }
}

@media (max-width: 768px) {
    .pc-nav {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .dropdown-menu {
        position: fixed;
        top: 65px;
        left: 0;
        background-color: rgba(0, 0, 0, 0);
        backdrop-filter: blur(10px);
        z-index: 999;
        text-align: left;
    }

    .dropdown-menu.active {
        max-height: 75vh;
    }

    .outro-card {
        flex-direction: column;
    }

    .outro-card img {
        width: 100%;
    }

    .notice-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .notice-date {
        margin-left: 0;
        font-size: 12px;
    }

    .petition-wrapper {
        flex-direction: column;
        text-align: center;
        padding: 30px 20px;
    }

    .large-btn {
        width: 100%;
        margin-top: 25px;
    }
}

@media (max-width: 600px) {
    .card {
        flex: 0 0 80%;
    }
}